(Reuters) - Activist investor Carl Icahn on Friday disclosed a 6.86 percent stake in Sharpie maker Newell Brands Inc and said he would talk to the company about possible representation on its board of directors. (Reuters) - Activist investor Carl Icahn on Friday disclosed a 6.86 percent stake in Sharpie maker Newell Brands Inc and said he would talk to the company about possible representation on its board of directors. Icahn had said earlier this month he owned a "large position" in Newell...